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<td valign="top">几个业务参与者可以在特定业务用例中扮演相同的角色。该共享角色建模为抽象业务参与者，它由原始业务参与者继承。</td>
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<a href="./../../../rup_bm/workproducts/rup_business_use_case_model_EC79264C.html" guid="{89BEF367-5875-47E0-97D6-23E5BCCE52B8}">业务用例模型</a>
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<div class="sectionHeading">Main Description</div>
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<td class="sectionTableSingleCell"><a key="业务建模中的参与者泛化关系（actor-generalization in business modeling）" text="指南" name="XE_actor-generalization_in_business_modeling__guidelines_for" id="XE_actor-generalization_in_business_modeling__guidelines_for" class="index"></a><a id="Top" name="Top"></a> 
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    几个业务参与者可以在特定业务用例中扮演相同的角色。因此，处理检入的业务用例将业务出差人员和游客看成相同的外部实体。共享的角色被建模为业务参与者“旅客”，两个原业务参与者继承它。以泛化关系来显示这些关系。
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    参与者“业务出差人员”和“游客”继承“旅客”的所有属性。因此，这两个参与者都可作为“旅客”。
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    另一方面，一个业务用户可以扮演与业务有关的几种不同角色，这表示用户可以对应于几个业务参与者。如果这是此类用户的一般行为，并且使用继承了几个业务参与者的一个业务参与者来表示该用户，该模型会变得更清晰。每个被继承的业务参与者代表与该业务有关的用户角色之一。
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